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Solubilities in the ammonium thiosulfate-urea-ammonium nitrate-water system at 0°C

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Abstract

Solubilities in the system CO(NH2)2-NH4NO3-(NH4)2S2O3-H2O were obtained at 0°C and pH values between 6.12 and 7.33. The new composition of matter, (NH4)6(S2O3)2(NO3)2·CO(NH2)2, was identified and characterized chemically and microscopically. Stable high-analyses solution fertilizers can be produced at 0°C utilizing waste ammonium thiosulfate solutions with standard ammonium nitrate and urea fertilizer materials. A 31-0-0-5.6S grade (%N-%P2O5-%K2O-Other) fertilizer solution can be formed at 0°C when NH4NO3/CO(NH2)2 is about one. Stable 30% total nitrogen solutions containing up to 10% sulfur can be produced at other NH4NO3/CO(NH2)2 ratios.

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Authors and Affiliations

  1. Chemical Research, Tennessee Valley Authority, National Fertilizer & Environmental Research Center, 35660, Muscle Shoals, AL, USA

    A. W. Frazier, Y. K. Kim & C. L. Griffin

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  1. A. W. Frazier
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  2. Y. K. Kim
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  3. C. L. Griffin
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Frazier, A.W., Kim, Y.K. & Griffin, C.L. Solubilities in the ammonium thiosulfate-urea-ammonium nitrate-water system at 0°C. Fertilizer Research 26, 99–105 (1990). https://doi.org/10.1007/BF01048747

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  • DOI: https://doi.org/10.1007/BF01048747

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